I've got a cheapo Garmin car GPS that I use in a special pouch on my bike and works great. Since I'm going to Morocco soon I'd like to use Olaf's maps. I've downloaded them and loaded them up in to RoadTrip (the Garmin software for Mac). Now I'm wondering how I can get those maps to appear in my GPS? I'm not sure if there is enough space for the maps on the GPS but don't see any error messages either. Should these maps be compatible with any GPS that can use RoadTrip and/or Mapsource?